I was able to use PuTTY on Windows 10 to login to the BBB via serial without root password after editing the /etc/passwd file. Typically the root account is set in the sshd_config to not allow remote ssh connections to a Linux system. You have to set this to allow for root login with or without a password. https://linuxconfig.org/enable-ssh-root-login-on-debian-linux-server
Jon On Thu, Apr 1, 2021 at 8:50 AM amf <[email protected]> wrote: > I'm going out on the limb here, but putty seem to have an issue with > logins without a password. I'm sure some one can provide more input on this. > > On Wednesday, March 31, 2021 at 12:59:59 PM UTC-5 [email protected] > wrote: > >> >> debian@beaglebone:/mnt/media/etc$ su root >> Password: >> su: Authentication failure >> debian@beaglebone:/mnt/media/etc$ su root >> Password: >> su: Authentication failure >> debian@beaglebone:/mnt/media/etc$ sudo nano shadow >> GNU nano 2.7.4 File: shadow >> >> root::18717:0:99999:7::: >> daemon:*:18112:0:99999:7::: >> bin:*:18112:0:99999:7::: >> sys:*:18112:0:99999:7::: >> sync:*:18112:0:99999:7::: >> games:*:18112:0:99999:7::: >> man:*:18112:0:99999:7::: >> lp:*:18112:0:99999:7::: >> mail:*:18112:0:99999:7::: >> news:*:18112:0:99999:7::: >> uucp:*:18112:0:99999:7::: >> proxy:*:18112:0:99999:7::: >> www-data:*:18112:0:99999:7::: >> backup:*:18112:0:99999:7::: >> list:*:18112:0:99999:7::: >> irc:*:18112:0:99999:7::: >> gnats:*:18112:0:99999:7::: >> nobody:*:18112:0:99999:7::: >> systemd-timesync:*:18112:0:99999:7::: >> systemd-network:*:18112:0:99999:7::: >> systemd-resolve:*:18112:0:99999:7::: >> systemd-bus-proxy:*:18112:0:99999:7::: >> _apt:*:18112:0:99999:7::: >> dnsmasq:*:18112:0:99999:7::: >> messagebus:*:18112:0:99999:7::: >> avahi:*:18112:0:99999:7::: >> sshd:*:18112:0:99999:7::: >> usbmux:*:18112:0:99999:7::: >> lightdm:*:18112:0:99999:7::: >> debian:rcdjoac1gVi9g:18112:0:99999:7::: >> bob::18717:0:99999:7::: >> >> >> >> >> >> >> >> >> >> >> [ Read 31 lines ] >> ^G Get Help ^O Write Out ^W Where Is ^K Cut Text ^J >> Justify ^C Cur Pos ^Y Prev Page M-\ First Line >> ^X Exit ^R Read File ^\ Replace ^U Uncut Text ^T To >> Spell ^_ Go To Line ^V Next Page M-/ Last Line >> >> On Wed, Mar 31, 2021 at 10:23 AM Bob Hammond <[email protected]> wrote: >> >>> Well, I thought it worked great but it doesn't. >>> >>> I applied all these commands to the BBB in question and specifically to >>> the root password entry but I am still unable to get into it. >>> When I attempt to log in with root, and enter a null password, I still >>> get "access denied". Same with all other usernames and passwords. >>> >>> Could it be a file permissions problem? >>> >>> On Wed, Mar 31, 2021 at 9:10 AM Bob Hammond <[email protected]> wrote: >>> >>>> amf, >>>> >>>> THIS works great! Thanks so much for the help. >>>> >>>> On Tue, Mar 30, 2021 at 8:52 AM amf <[email protected]> wrote: >>>> >>>>> If you just want to reset the password on the new imaged BBB (this >>>>> does not explain why you had issue in the first place, but does allow you >>>>> to access the system) >>>>> clear the encrypted password as follows, (if you need detailed steps >>>>> let me know) >>>>> create a sdcard with a new image (one you download) and boot the BBB >>>>> with it. >>>>> then mount the emmc device >>>>> edit /etc/shadow file in the mounted emmc device (requires sudo) >>>>> find the user name you want to remove the password on >>>>> for example, my user name is 'amf' >>>>> amf:$6$jlBY96dq$V7tFs2xEv.a3kXArkyTEcEbGDX43d6UpzMcy/aplV8khxUFJKPMg0ugGBfWVZMpJRpaMXAATEAb5inu7/G.Iz1:16406:0:99999:7::: >>>>> >>>>> delete the stuff between the first two '::' >>>>> pi::16406:0:99999:7::: >>>>> save the shadow file >>>>> power off the BBB >>>>> remove sdcard, and power on the BBB >>>>> log in with the user name that the encrypted password was deleted on, >>>>> no login password is required, then set new password for the user. >>>>> >>>>> Hope this helps. >>>>> amf >>>>> On Tuesday, March 30, 2021 at 9:02:25 AM UTC-5 [email protected] >>>>> wrote: >>>>> >>>>>> I am now attempting to get into GRUB during boot. I never see a GRUB >>>>>> menu show up by pressing/holding ESC or left shift. What I do see is >>>>>> that >>>>>> I can interrupt boot by pressing the spacebar. I then get a command >>>>>> prompt >>>>>> in ??. And I have no idea what to do after that. >>>>>> >>>>>> On Monday, March 29, 2021 at 6:27:52 AM UTC-7 Bob Hammond wrote: >>>>>> >>>>>>> Thanks Andrea. Once I get in, I will check the logs. The sshd is >>>>>>> likely up as you state. The BBB is protected by a firewall on my >>>>>>> router as >>>>>>> well as iptables. And no, I didn't have enforced sshd to accept only >>>>>>> user >>>>>>> connection. >>>>>>> >>>>>>> All very good ideas! >>>>>>> >>>>>>> >>>>>>> On Sunday, March 28, 2021 at 6:05:22 AM UTC-7 [email protected] >>>>>>> wrote: >>>>>>> >>>>>>>> I found this for the serial connection. >>>>>>>> >>>>>>>> >>>>>>>> https://www.dummies.com/computers/beaglebone/how-to-connect-the-beaglebone-black-via-serial-over-usb/ >>>>>>>> >>>>>>>> Some ideas : >>>>>>>> Once in as root, I would >>>>>>>> - change the root password : >>>>>>>> # passwd >>>>>>>> - The user password: >>>>>>>> # passwd username >>>>>>>> Check the logs focus in the time you had attempted the remote login >>>>>>>> - find why it was not allowed to login. >>>>>>>> Check the sshd service is enabled (however should be up) >>>>>>>> Have you hardened your configuration? Ie any firewall (iptables) , >>>>>>>> any fail2ban or something else; >>>>>>>> Enforced sshd to accept only user connection (no root)? >>>>>>>> >>>>>>>> A. >>>>>>>> >>>>>>>> On Sun, 28 Mar 2021, 14:48 Bob Hammond, <[email protected]> wrote: >>>>>>>> >>>>>>>>> I am using a windows machine with PuTTY to connect to the BBB. >>>>>>>>> >>>>>>>>> On Sun, Mar 28, 2021 at 5:44 AM Bob Hammond <[email protected]> >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>>> I am able to connect to the BBB with PuTTY and get a prompt to >>>>>>>>>> log in. I have tried debian/temppwd and that doesn't work. >>>>>>>>>> >>>>>>>>>> I've read about using a serial connection to the BBB and >>>>>>>>>> interrupting the boot sequence to gain access. Anyone done that? >>>>>>>>>> >>>>>>>>>> On Saturday, March 27, 2021 at 4:41:30 PM UTC-7 >>>>>>>>>> [email protected] wrote: >>>>>>>>>> >>>>>>>>>>> Try logging in as user : debian >>>>>>>>>>> Password: temppwd >>>>>>>>>>> >>>>>>>>>>> Check your spelling after u enter user name >>>>>>>>>>> >>>>>>>>>>> Sent from my iPhone >>>>>>>>>>> >>>>>>>>>>> On Mar 27, 2021, at 7:12 PM, amf <[email protected]> wrote: >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> I followed your instructions, once I obtained the new ip, I was >>>>>>>>>>> able to login as the user of the origanl BBB. >>>>>>>>>>> Without knowing details of your setup it is difficult to help >>>>>>>>>>> is your desktop/laptop a windows or linux machine? >>>>>>>>>>> if linux you can get the ip of the new BBB with "ping >>>>>>>>>>> <hostname>.local" provided 'avahi' is installed (there may be other >>>>>>>>>>> ways, >>>>>>>>>>> this works for me) >>>>>>>>>>> >>>>>>>>>>> ping beaglebone.local >>>>>>>>>>> PING beaglebone.local (192.168.3.108) 56(84) bytes of data. >>>>>>>>>>> 64 bytes from 192.168.3.108: icmp_seq=1 ttl=64 time=1.31 ms >>>>>>>>>>> >>>>>>>>>>> if windows, someone else will need to chime in, >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> On Saturday, March 27, 2021 at 7:39:21 AM UTC-5 >>>>>>>>>>> [email protected] wrote: >>>>>>>>>>> >>>>>>>>>>>> I duplicated my BBB setup to a SD card using this procedure: >>>>>>>>>>>> >>>>>>>>>>>> Debian distribution: >>>>>>>>>>>> >>>>>>>>>>>> 1. Boot master BBB with no SD card in >>>>>>>>>>>> 2. Insert SD card >>>>>>>>>>>> 3. Log in (e.g. with serial terminal, SSH etc.) and run sudo >>>>>>>>>>>> >>>>>>>>>>>> /opt/scripts/tools/eMMC/beaglebone-black-make-microSD-flasher-from-eMMC.sh. >>>>>>>>>>>> LEDs will flash in sequence whilst SD card is being written. >>>>>>>>>>>> 4. When the LEDs stop and the script terminates, remove the >>>>>>>>>>>> SD card. >>>>>>>>>>>> 5. Insert SD card into new BBB then power on. >>>>>>>>>>>> 6. eMMC will be flashed; LEDs on new BBB will flash in >>>>>>>>>>>> sequence until complete. >>>>>>>>>>>> >>>>>>>>>>>> After doing this, I rebooted the BBB. >>>>>>>>>>>> >>>>>>>>>>>> Now, I am unable to remotely log in using PuTTY, user is root, >>>>>>>>>>>> and root password. Or any other username and password. >>>>>>>>>>>> >>>>>>>>>>>> The BBB is running fine (collecting seismic data) but I am >>>>>>>>>>>> completely locked out! >>>>>>>>>>>> >>>>>>>>>>>> Any suggestions on how to get access to the BBB? >>>>>>>>>>>> >>>>>>>>>>> -- >>>>>>>>>>> For more options, visit http://beagleboard.org/discuss >>>>>>>>>>> --- >>>>>>>>>>> You received this message because you are subscribed to the >>>>>>>>>>> Google Groups "BeagleBoard" group. >>>>>>>>>>> To unsubscribe from this group and stop receiving emails from >>>>>>>>>>> it, send an email to [email protected]. >>>>>>>>>>> To view this discussion on the web visit >>>>>>>>>>> https://groups.google.com/d/msgid/beagleboard/833795ff-61b4-418c-a142-9aed980e01a7n%40googlegroups.com >>>>>>>>>>> <https://groups.google.com/d/msgid/beagleboard/833795ff-61b4-418c-a142-9aed980e01a7n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>>>>>>> . >>>>>>>>>>> >>>>>>>>>>> -- >>>>>>>>>> For more options, visit http://beagleboard.org/discuss >>>>>>>>>> --- >>>>>>>>>> You received this message because you are subscribed to a topic >>>>>>>>>> in the Google Groups "BeagleBoard" group. >>>>>>>>>> To unsubscribe from this topic, visit >>>>>>>>>> https://groups.google.com/d/topic/beagleboard/KvIoUzehk_o/unsubscribe >>>>>>>>>> . >>>>>>>>>> To unsubscribe from this group and all its topics, send an email >>>>>>>>>> to [email protected]. >>>>>>>>>> To view this discussion on the web visit >>>>>>>>>> https://groups.google.com/d/msgid/beagleboard/0fea8e1c-4c08-43cc-a023-5fce0b05209en%40googlegroups.com >>>>>>>>>> <https://groups.google.com/d/msgid/beagleboard/0fea8e1c-4c08-43cc-a023-5fce0b05209en%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>>>>>> . >>>>>>>>>> >>>>>>>>> -- >>>>>>>>> For more options, visit http://beagleboard.org/discuss >>>>>>>>> --- >>>>>>>>> You received this message because you are subscribed to the Google >>>>>>>>> Groups "BeagleBoard" group. >>>>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>>>> send an email to [email protected]. >>>>>>>>> >>>>>>>> To view this discussion on the web visit >>>>>>>>> https://groups.google.com/d/msgid/beagleboard/CAKoB7OpieQonkXW003iq5APE2Ze74UMWBOrpNXF6q%3DSp8vZwMg%40mail.gmail.com >>>>>>>>> <https://groups.google.com/d/msgid/beagleboard/CAKoB7OpieQonkXW003iq5APE2Ze74UMWBOrpNXF6q%3DSp8vZwMg%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>>>>>>> . >>>>>>>>> >>>>>>>> -- >>>>> For more options, visit http://beagleboard.org/discuss >>>>> --- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "BeagleBoard" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/beagleboard/03c226b8-ca48-4c3f-92ee-4f2c603bb57fn%40googlegroups.com >>>>> <https://groups.google.com/d/msgid/beagleboard/03c226b8-ca48-4c3f-92ee-4f2c603bb57fn%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/bcd5d629-867b-4f16-a5dc-7b2f70b13057n%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/bcd5d629-867b-4f16-a5dc-7b2f70b13057n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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